White M Hairstreak

White M Hairstreak

Underwing pattern on the White M Hairstreak.

The White M Hairstreak (Parrhasius m-album) is a southeastern hairstreak with a distinctly marked hindwing and beautiful top wing.

The White M is a medium size butterfly, but would probably be considered large for a hairstreak. It is not very common in Maryland, as far as I can tell, but the hairstreaks are tough to identify with the naked eye, so I may have seen more than I think.

The one above was photographed at Idylwild WMA.

The upperside of the White M is a glorious blue, visible only in flight as the White M sits with wings closed. Still, with wings closed it is easy to distinguish with a single white speck at mid-wing and the single strong red spot.

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